User`s manual
Table Of Contents
- 1. Introduction
- 2. Getting Started
- Powering on the W406-LX
- Connecting the W406-LX to a PC
- Configuring the Ethernet Interface
- USB Port for Expansion
- SD Socket for Storage Expansion
- Setting Up the Wireless Module
- Configuring the SIM Card
- Entering the PIN Code
- Verifying the SIM Card Status
- Enabling or Disabling the PIN Code Authentication
- Changing the PIN Code
- Unlocking the SIM Card
- Connecting to the Internet
- Reconnecting to the Internet
- Disconnecting from the Internet
- Detecting an Internet Connection Error
- Sending and Reading an SMS Message
- Deleting an SMS Message
- Test Program—Developing Hello.c
- 3. Managing Embedded Linux
- 4. Managing Communications
- 5. Development Tool Chains
- 6. Programmer’s Guide
- 7. Software Lock
- A. System Commands

W406-LX User’s Manual Getting Started
2-8
Setting Up the Wireless Module
Before using the W406, make sure the SIM card is properly installed and the antenna is connected.
(Refer to the W406 Hardware User’s Manual for details.) Please note that the SIM card must be
installed when the embedded computer is powered off.
The LED indicators on the front panel can be used to check the signal strength. A background
process “egprsagent” is responsible for this task.
Configuring the SIM Card
NOTE: Make sure you have the correct PIN code. After three failed attempts to enter PIN
code, the SIM card will be locked, and you will need the PUK code to unlock the SIM card.
After ten failed attempts to enter the PUK code, the SIM card will be deactivated and no
longer operable.
Entering the PIN Code
Use the sim_input_pin –p PIN code command to enter the PIN code. For example, type
sim_input_pin –p 0000 to enter the PIN code 0000.
To save the PIN code and perform automatic authentication next time the system boots up, add –s
after the PIN code.